RESEARCH ARTICLE


The Stress-related related Damping Ratio of Box Girder with Corrugated Steel Web



Pengfei Li, Baodong Liu*, 1, 2, Bo Li, Minghzhe Yang
1 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
2 Research Institute of Highway, MOC, Beijing 100088, China


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Creative Commons License
© 2014 Li et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to the author at the School of Civil Engineering, Beijing Jiaotong University, Shangyuancun 3, Haidian District, Beijing 100044, PR China; Tel: 86-010-51687252; Fax: 86-010-51687248; E-mail: baodongliu@vip.sina.com


Abstract

In this paper, the stress-related damping ratio formula of box girder with corrugated steel webs is introduced. Using response spectrum method, an iterative algorithm is proposed to calculate the seismic response and the stress-related damping ratio under different seismic intensities. Based on a simply supported composite box girder bridge with corrugated steel webs, the stress-related damping ratios are calculated under different seismic intensities through iteration. The analysis and comparison show that the stress-related damping ratio increased with the seismic intensity, which is smaller than 0.05 under the lower seismic fortification intensity, and larger than 0.05 under the higher seismic intensity. Different damping ratios should be considered under different seismic intensities for the seismic response analysis of the bridge.

Keywords: Box girder with corrugated steel webs, iteration, seismic peak ground accelerations, stress-related damping ratio.